• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Transparent and translucent casting resins for LED
Transparent and translucent casting resins for LED

Quantum eraser article from Scientific Amerian
Quantum eraser article from Scientific Amerian

... method to obtain such information: place a light source symmetrically between the two slits. The photons would bounce oÝ the electrons. The direction of motion of the scattered photons would tell the experimenter whether they originate near the upper or the lower slit. FeynmanÕs analysis of the elec ...
III-Advanced Lithography
III-Advanced Lithography

... depends on resist properties and the lithography system ( 0.6-0.8) You may remember that, for a plane wave incident on a grating of period d, the angles q at which the intensity maxima in the image occur are given by: sin q = N l/d, where N= 0,1,2,…. ...
Chemistry - Beachwood City Schools
Chemistry - Beachwood City Schools

... Bohr's model included an electron orbiting the nucleus as a planet does the sun; according to the quantum mechanical model, we can only define the probability of finding an electron at a given location. When electrons drop from higher energy levels to lower ones, they give off energy in the form of ...
light
light

... velocity of the car during this 20.-second interval? [show work] ...
ApproxGI
ApproxGI

PDF only
PDF only

... in different possible ways). As earlier mentioned, it is not the net energy (which can remain zero), but the amount of positive matter-energy present that determines the thermodynamic properties of a closed system. Eq.(8) above, may be viewed as incomplete without adding the work terms, P∂V. We leav ...
Waves & Oscillations Physics 42200 Spring 2013 Semester
Waves & Oscillations Physics 42200 Spring 2013 Semester

... – Can be used to analyze interference – Stokes parameters only describe the irradiance (intensity) of light – Stokes parameters/Mueller matrices only apply to incoherent light – they do not take into account phase ...
Outreach Magic: Easy Demonstrations from the
Outreach Magic: Easy Demonstrations from the

POP4e: Ch. 25 Summary - AppServ Open Project 2.4.9
POP4e: Ch. 25 Summary - AppServ Open Project 2.4.9

1. Which of the following pairs of quantities of a moving object must
1. Which of the following pairs of quantities of a moving object must

The interpretation of the Einstein-Rupp experiments and their
The interpretation of the Einstein-Rupp experiments and their

SCH4U - Unit 1
SCH4U - Unit 1

... place at a certain time. There are calculations that can be done to describe the region in space where the electron is MOST LIKELY to be found, however we will not focus on the mathematical in this course, Regions where electrons are most likely to be found are called orbitals. For every value of n, ...
Tissue Optical Properties
Tissue Optical Properties

ppt - Jefferson Lab
ppt - Jefferson Lab

Quantitative Analysis of the Electrostatic
Quantitative Analysis of the Electrostatic

The Properties of Light and Color – What we see
The Properties of Light and Color – What we see

Waves Summary Notes
Waves Summary Notes

midterm review for 2
midterm review for 2

Document
Document

Document
Document

Ch.2 lecture
Ch.2 lecture

... Hotter objects emit more photons at all wavelengths (per unit area) Hotter objects emit photons with a higher average energy ...
Black Holes and Special Relativity
Black Holes and Special Relativity

Nobel Laureates in Physics
Nobel Laureates in Physics

SED123 - National Open University of Nigeria
SED123 - National Open University of Nigeria

< 1 ... 16 17 18 19 20 21 22 23 24 ... 208 >

Photoelectric effect

The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photoelectrons. The phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.According to classical electromagnetic theory, this effect can be attributed to the transfer of energy from the light to an electron in the metal. From this perspective, an alteration in either the amplitude or wavelength of light would induce changes in the rate of emission of electrons from the metal. Furthermore, according to this theory, a sufficiently dim light would be expected to show a lag time between the initial shining of its light and the subsequent emission of an electron. However, the experimental results did not correlate with either of the two predictions made by this theory.Instead, as it turns out, electrons are only dislodged by the photoelectric effect if light reaches or exceeds a threshold frequency, below which no electrons can be emitted from the metal regardless of the amplitude and temporal length of exposure of light. To make sense of the fact that light can eject electrons even if its intensity is low, Albert Einstein proposed that a beam of light is not a wave propagating through space, but rather a collection of discrete wave packets (photons), each with energy hf. This shed light on Max Planck's previous discovery of the Planck relation (E = hf) linking energy (E) and frequency (f) as arising from quantization of energy. The factor h is known as the Planck constant.In 1887, Heinrich Hertz discovered that electrodes illuminated with ultraviolet light create electric sparks more easily. In 1905 Albert Einstein published a paper that explained experimental data from the photoelectric effect as being the result of light energy being carried in discrete quantized packets. This discovery led to the quantum revolution. In 1914, Robert Millikan's experiment confirmed Einstein's law on photoelectric effect. Einstein was awarded the Nobel Prize in 1921 for ""his discovery of the law of the photoelectric effect"", and Millikan was awarded the Nobel Prize in 1923 for ""his work on the elementary charge of electricity and on the photoelectric effect"".The photoelectric effect requires photons with energies from a few electronvolts to over 1 MeV in elements with a high atomic number. Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave–particle duality. Other phenomena where light affects the movement of electric charges include the photoconductive effect (also known as photoconductivity or photoresistivity), the photovoltaic effect, and the photoelectrochemical effect.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report